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Q 1636156072.     The angle between the lines whose direction

ratios are `(1, 1 ,2), (sqrt(3) -1, - sqrt(3) -1,4)` is

GGSIPU 2014
A

`cos^(-1) (1/(65))`

B

` pi /6`

C

` pi /3`

D

` pi /2`

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